1.

Which of the following schedule are not conflict serializable?

A. r₁(A); w₁(A); r₂ (A); w₂(A); w₁(B)
B. r₁(A); r₁ (B); w₂(A); r₃(A); w₁(B); w₃(A); r₂ (B); w₂ (B)
C. r₁(A); w₁(A); r₂ (A); w₂(A); w₁(B)
D. w₃ (A); r₁ (A); w₁ (B); r₂ (B); w₂(c); r₃ (c)
Answer» E.


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